During early embryonic development in this organism, PAL-1 and GLD-1 are localized to the anterior and posterior respectively. X-inactivation in this organism occurs by downregulating both X chromosomes equally rather than inactivating one or the other. The lin-4 non-coding 
During early embryonic development in this organism, PAL-1 and GLD-1 are localized to the anterior and posterior respectively. X-inactivation in this organism occurs by downregulating both X chromosomes equally rather than inactivating one or the other. The lin-4 non-coding RNA was originally discovered in this organism, and Andrew Fire used this organism to elucidate RNAi. In states of crowding or starvation, this organism can go directly from stage L2 to a dauer state, and during development this organism undergoes exactly 191 apoptotic events. The fate of every cell in this organism has been mapped, and Sydney Brenner originally pioneered its study. This organism has hermaphrodite and male sexes. For 10 points, name this nematode and common model organism.
During early embryonic development in this organism, PAL-1 and GLD-1 are localized to the anterior and posterior respectively.
Caenorhabditis {Elegans}